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How to Write-Protect Your USB Flash Drive


This can be done by adding a small entry to the Windows registry which acts as a switch that can be enabled to make use of the write protection or disabled to allow write access. Just follow these steps:
1. Open the Registry Editor (Open the “Run” dialog box, type regedit and hit “Enter”).
2. Navigate to the following Registry key:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\
3. Create a New Key named as StorageDevicePolicies. To do this right-click onControl, and click on New->Key and name it as StorageDevicePolicies.
4. Now right-click on StorageDevicePolicies and create a New->DWORD (32-bit) Valueand name it as WriteProtect.
writeprotect usb
 5. Double-click on WriteProtect and set the Value data to 1.
Now the right-protection for USB drives is enabled on your computer (no restart required) and thus it would not be possible for anyone or any program to add/delete the contents from your USB flash drive. Any attempt to copy or download the files onto the USB drive will result in the following error message being displayed.
usberror

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